Bias cutting machinery



Aug. 17, 1943. D. BALK ET AL 2,326,746

BI AS CUTTING MACHINERY Aug.tl17, 1943. D, Bmg ETAL 2,326,746

BIAS `CUTTING MACHINERY law ArroRNEY.

Aug-17,1943. D. BALK ET ALA 2,326,746-

BIAS CUTTING MACHINERY Filed Sept. 12, 1942 l5 Sheets-Sheet I5 La] L EL Dowd Bour JJh'us lfmjz Frank F? MaJoros E7 2525 5 37 /0 INVEN'roRs BY; Q L

Hw), ATTORNEY ug. 17, 1943. D, BALK ET AL 2,326,746

BIAS CUTTING MACHINERY Filed Sept. 12, 1942 l5 Sheets-Sheet 4 BY Frank PMajoros k ATTORNEY.

Aug. 17, 1943.

D. BALK ET Al.

BIAS CUTTING MACHINERY 15 Sheets-Sheet 5 Filed sept. 12, 1942 BF ank P MoJ-oros Aug. 17, 1943. D. BALK'ET Al. 2,326,746

BIAS CUTTING MACHINERY Filed Sept. 12, 1942 15 Sheets-Sheet 6 lil: I3-

`32/ D my mm Z Doyd Balk 32o A.Tullus Ko+z ZZ Frank F? Mejores f--m l INVEN'roRs www Wm 2L.; ATroRNEY.

Aug.

17, 1943. D. BALK ET A1.

BIAS CUTTING MACHINERY l5 Sheets-Sheet 7 Filed Sept. 12, 1942 IIII Frank P Ma'oros INVENT RS JLM' ArroRNEY.

Aug. 17, 1943.I D, BALK ET AL 2,326,746

`B IAS CUTTING MACHINERY Filed sept. 12, 1942 15 sheets-sheet 8 /0 EOE 20'2 203' I I E' lNvENToRs mop/id Balk ATTORNEY Aug. 17, 1943. D. BALK ETAL 2,326,746

BIAS CUTTING MACHINERY Filed Sept. 12, 1942 15 Sheets-Sheet 9 [E- Ell LEM). AvroRNEY.

Aug. 17, 1943. D. BALK ETAI. 2,326,746

BIAS CUTTING MACHINERY Filed sept. 12, 1942 15 sheets-sheet 1o '246\ 24g.. 239 a n F4 w T f 243 245 2431 I i E y 63 5 7 :l I

i 'f1 l l E l la l! 1I l 23,9 244 56 -T li U l 251 125 Juhus Koi' D Frank P. MqJoros 12m ATroRNEY.

Dah-d Balk z Aug- 17, 1943- D. BALK ET A1. l v2,326,746

BIAS CUTTING MACHINERY Filed Sept. l2, 1942 15 Sheets-Sheet 11 Doyd Balk Jblsus Kof'z frank P. Mejoras INVENToRs www@ Jim ATTORNEY.

Aug. 17, 1943. D. BALK ETAI.

BIAS CUTTING MACHINERY 15 Sheets-Sheet 12 Filed Sept. 12, 1942 Illlrl [l David Balk J'UI'US KoJrz Frank l? Moj'oros INVENTORS TWL A'IrORNEY4 Aug. 17, 19431 D. BALK ET AL I '2,326,746 v BIAS'GUTTING MACHINERY Filed sept. 12, 1942 15 sheets-sheet 14 1' i Doyl-d Balk Jhus KOT;

FranKPMa'or INVENTo 5 BY w ATTORNEY Aug. 17, 1943. D. BALK ET Al.

BIAS CUTTING MACHINERY l5 Sheets-Sheet l5 Filed Sept. 12, 1942 s o rl LA m 5 R O T N E V m Patented Aug.`17`, 1943 2,326,746 f f f Y ems CUT'rrNG MACrimERr" 'Davia' Balk and .ni'lius Kaufmann i alla 'Frank 1 P. Majoros, Brooklyn, N. Y., assignors,by direct j and mesne assignments, to Superba Manufacturing Co., Inc., New York, -N. Y., a corporation l f of New York Application September l2, 1942,' Serial No. 458,152

` si loll 'itatn This invention'relates to improvements inbias cutting machines of the type used -for cutting strips spirally from tubular fabrics or textile materials The invention has for its object 13o-provide a bias cutting machine 'of theA character herein-` after described, which is extremely simple in ccnstruction and efficient in'operation'and which' is adjustable toV accommodate. wide variations in the diameter of the tubular material.

A further object of the present invention is' to provide means capable of adjustment to vary the angle of bias at which the 'material is cut.

A further object of the present invention is to provide extensible supporting standards `for the mandrel sections'to allow for'very large' diameter tubular materialalthe bias cut strip of which is necessarilyfof a Width requiring considerable height romthe base to the knife in order' 'to' be withdrawn from the machine. I

And a still further object of the Vinvention is to provide means whereby slight adjustment of the cutting and Yfeeding mechanismallows either clockwise or counter-'clockwise movement Yof the tubular material for the purpose of `Vcutting the seam of the tubular material Yat the most eicient angle.

And a still further object 'of this invention Ais to provide a plurality of mandrel sections which may be combined to form a single mandrel over` which'tubular materialis 'spirally Vfed and cut to form a strip, and which may bel used separately Y to handle a plurality of tublngs for cuttingstrips having the same or difierentb'ia's. f

`The objects of theinv'ention are accomplished by means'of variouscombinations and arrangements ofparts hereinafter `Clescribed"set Vforth in the appended claimsand illustratively errem-V plied in the accompanying drawings, in which:

Figure l is a side elevational view o f one'em- Y Figure 8 Ais aperspective view of laiportion of` onestandardy and' the extensible support for the mandrelsection carried bythe standard; Y

' `Figure' 9`is'a substantially transverse sectional view of a standard and a top plan view of a supporting sector for the compensating rollers;

` Figure 10 isv Va 'substantially ,transverse sectional viewof la mandrel'section, feeding rollers and cuttingattachment;

"Figure "11 is 'ai sectional 'viewy taken on lines 4ligure 12 is an elevational' view of'the cutting i guide; Y

AFigure 17is a substantially transverse sectional view ,of a pair of mandrel sections taken'on line ll-I'I'of Figurevl; i

Figure 18 is a top plan elevati-onalview of a modified'supportinig bed and adjustablecarriages f for two-movable mandrel sections;

Figure 19 isa substantially longitudinal sectional view of theY modied supporting bed and carriages taken on line lil-igor Figurel;

Figure'20 is an insideelevational View, looking in ,the direction of arrows Eil-2!! orfFigure 21,

bodiment of the bias cutting vmachine, looking in the direction of the cutting element; I

Figure 2 is a side elevational View of the oppograduated `scale for setting the movablecarriag'e Y to accommodate the machine to various tube diameters;

Tfigure 6 is an elevational view oiftheback of a mandrel section showing the adjustableplate and l support for the driving feed roller;

Figure l is al substantially llongitudinal sectional viewA of the Ymandreland plate taken on line 1-1 of-Figure;

ofa modified arrangement of compensating rollers, showingupper'and lower supporting units for' the rollers va-nd means for changingthe relative .positions of the rollers; A

Figure 21` is a substantially'transverse sectional vieW of the inodied arrangement taken on line 2I'-2l of Figure 20;

Figure 22 is a sectional View of a still further modification or upper and' lower support for compensating 'rollers taken on line 22-22 'of Figure '23;' i

, Figure 23 is a tcp plan view of themodication of yFigure 22 Figure 24 is an enlarged longitudinal sectional view ofrone end of asupporting'unit of al com-r taken on line llt-24 of Fighandle-the tubular material travelling in clockwise direction; Y

Figure 2'7r is an elevational view of a mandrel section and two sets of feed and pressure rollers capable of adjustment from clockwise to counter-clockwise direction and to intermediate an gular positions;

Figure 28 is a detail elevational View of the Figure 27;

Figure 29 is an elevational view porting means, showing angular adjustment thereof in dotted lines;

Figure 30 is an elevational View of the back of a mandrel section showing two sets of feed rollvers and means for driving same;

Figure 33A is an elevational View similar to that shown in Figure 30 except thatthe section is adjustable only for change in direction of bias feed;

Figure 3l is a front elevational View of a mandrel in rwhich each section is provided with la cutting element, in addition to the feed and pressure rollers, to effect a bias cut at opposite sides of the material and thus to produce bias strips; Y*

Figure 32 is an elevational view of mandrel composed of a single section and a single feed and pressure unit, to feed the material either clockwise or counter-clockwise;`

Figure 33 is an end elevational View of the same Jfor operating the same at, any angle Aof adjustment; y t I Figure 34 is a front elevational View of a single mandrel section showing two feeding units arranged in a kV-formation and capable of feeding the material over the mandrel in either a clockwise or a counter-clockwise direction;` Figure 35 is an end elevational view of the same; Figure 35 is an elevational view'of section showing a modied feed unit;

Figure 37 is side elevational View of a sectional mandrel and means to enlarge the latter; i

Figure 38 is a top plan view of the same; Figure 39 is a top plan View of two V-shaped mandrel sections; Y

Figure 40' is a front elevational view of i, the same;

, Figure 41 is a top plan View of two U-shaped mandrel sections;

Figure 42 is a front elevational 'View of theV same.; v Y I y Figure 43 is a top plan view of two three-'sided mandrel sections; f

` Figure 44 is a top plan view of two four-sided mandrel sections;

a mandrel Figure 45 is a front elevational View of the` Figure 49 is a substantially transverse sec-k tional view of mandrel sections each having a very slightly curved outer profile to accommodate relatively long feed and pressure rollers.

of the supdouble V-shaped feed supporting means for the pressure rollers of v In the arrangement about to be described, thev tubular material to be cut isfed downwardly, while rotating, from an overhead-rollcarried in a revolvable support, which may be of any of the I well known structures used for the purpose, and

which therefore, will not be illustrated or described in connection with the present invention.

Referring to the drawings and particularly to Figures* 1 to 15, inclusive, the invention comprises a at bed plate l0, which supports the entire bias cutting mechanism, and which is provided at opposite ends of the plate with uprightstandards I I and I2, see Figures 1, 2, 3 and 5. The standard H is provided at its mid portion with a bore I3 and at its upper end with a yoke portion I4, the arms of which are bored to receive ythe stud pins I5 o1" a bearing sleeve If The other standard i2 is at the opposite end of the plate lC and comprises an upright portion provided with a xed bearing I 'I substantially alined witlrthe bearing sleeve I6 and an arcuate `shaped upward projection I8 having a bearing I9 directly over the axis of [the bearing l1 and at right angles thereto. Loosely mounted inthe vbearings I5 and l1 is a driven shaft V2S which projects beyond the bearing i1 to receive a groove pulley 2i. Mounted upright on the base of the bearing standard I2 and in front of the upright portion thereof is a supporting standard 22 which is pro vided with a bore ZSVreceiving Yone end of a fixed guide shaft 24, `the opposite end thereof being xed in the bore I3 .of the standard ll. According to this arrangement the rotarydriven shaft 20 and guide vshaft 24 are disposed directly over one another, as illustrated in Figures 1 and 2.

The guide shaft 24 is a Xed rod, which guides a carriage longitudinally of the plate IE5, the carriage 25 comprising a platform 25' provided with depending bearings Elk `at opposite ends to Vembrace the rod or shaft 24; and depending side portions 23 provided with axles 29 and wheels 3l) which traverse the surface of the plate Iii. This construction allows theV carriage 25 to be moved longitudinally or .theV plate il! between the standards I I andrwl2. A pointer 3l' is carried at one Side of the carriage 25 and is disposed to register with'the graduations of ascale 32 arranged on the plate IIBA along the path of movement of the pointer. The carriage 25' may be nxed in any position along the guide rodiZfl by means of a set-screw or clamp 33 adjustable in the platform 26against the rod 24. The 'set screw 33 is providedv with a handle or grip portion 3f'. to facilitate manipulation of the screwffrom the platform. f Y

'Ihe carriage 25 carries what will be referred to hereinafter as' the vmovable mandrel section while the plate I@ supports the so-called xed mandrel section.'

The platform 25 of :the carriage 25 is substantially the width of the plate IQ and upon its upper surface adjacent the inner corners are adjustable sockets 35 which support'upright tubular standards 36 for thenoovable mandrel section. The support for Vthe xed mandrel section comprises sockets 3'! mounted on the plate It adjacent opposite sides of the standard I2 and adapted to support upright tubular standards similar to the standards 36. i

The carriage 25 also supports a third socket f 39 at itsoutside corner to support anfupright tubular standard 40 andan upright bracket 4I in the mid section of the platform 26,-Kthe bracket 4I having an openingr 42 atthe proper point to accommodate the passage of the shaft 20. The

' mensaje brackets! is angular. atitsupper.l end. to provide avertical bearing 43 for a shaftdthelower end` thereof being". provided with: a .imitan gearwl in inesh with amitergearr fkeyed.tothedriven shafty ,2d `so as to. causethe miter; gear.- f to turn with theshaft and toallow lORgitudinahmm/e ment'thereofiwithithefc A iage 2.5. Thesliaft Mv is'connected tothe operaing mechanism oi` the movable .mandrel section in thernanne-r. hereinE after described. l The, operating ineclfranisin. of

the xed mandrel'section is Adrivenfby,'rneansof amiter gear il iixed on the shaft f-adjauent the bear-ing. .I 1- and` meshed. with -a -initer 68 on. the lower end of an upright. shaft lliV jour:- nalled inthe bearing iii-jef theupper end ofthe standard l2; y Y ,i

The upright tubular. standaards 'i-andu'iare openat their upperiends to receive-the deneiid.L ingv legs 5..anddi respectively-oi movable andliixed mandrelsections.y 'lfh'e legs and. 5i'

are. rods whichy fit slidabl-yy in their. standards seas toallow for upright adjustment .ofjthe'mandrel supportingfequipment .toA accommodate theY larger diametery materials; the wide biascut stripsof which, as. hereinafter described; require agreater lieight'from which'to bediselrargedzom tiiebie's cutter andinto rewinding 'positiodlthan is` nece essary with theV Vsmaller strip beingdischarged from the. normal size. tubularr materials. The' rods .58.and. 5i .are xed toithei-r standafrdsg.Y after adjustment, byrrneans oi seti'screws Ewhichrtare caritiectbyV the standards@ adiacenti their.` doper' open ends and whichY tighten against the-fro'dsftov hold tnemrrnly against-movement. Y

The rods-,formingan extensionof the'. upa' f.

right standards 36 of:theinovable mandrel s'e'cable theufsameiso-bei` moved a@ downwardlyy directedspisal about the flat mandrel.- plates 5,4' zv andf59.-'rA 'c The` meansused inl the present instance to ieedthe. material over` tlieiA mandrel sections in a downwardly spiral.-v direction; as illustratively exemplified in Figures 1 to l5, i1f1clusive,fc'omV prisesafeed `rol-ler 63v (for plateand-:aimedv roller-64 forfplate59..Y Eachfeedrolle'riscom# f posedzof, rubber, ymetal :or l other' 'suitable'traction materiali and; its longitudinal dimension is' greatl enough: to l afford farnp'le contact with; the:r back.:V of: the material Vtraversing Y the-'mandrel section:-`

Mitos-insure a-properf'feeding condition.;v 'The' opposite ends; ot f the=feed frollen 6% are :providedfI with stu-d' shaitsawhichgare journalled :in bearings:

65 disposed onr theback. of: a.-rotary adjustable? disc 661; li-disc B6'ismounted-in.arcircular openL Y ing l-'l in therimidf portion for" each .ofctlrez plates; Mland* and itsv'oppositesfaces are'` flush thesefof its-pl-ate. Eachrdiscisfprovided with ai diametrically dsposedjsloft C18 navingtaperedsidef wallsv se' andfaccommodating the" por-tion'.r of# its; rollerr Beloit-V64; Win'cl'ifprojeats"` toward'sf 'chefouter face of theadisc ,withiwhic'h it is substantially? nush. YIn;Ifligure:6'the: roller'lBB-'and adjacent partsf ai-e illustrated: as they appear'when' view-'-S A ing: them fromitn-ee inner1 side ofthe-space' be.-

tion project above the standards'a' distance sufY` cientto receive and support-- the -rnandrelfproper designated 54. The mandrel`- 54am its simplest form. comprises aflat, prei'eiablyv square, boa-rtf.

or plate,4 coinciding at opposite upright sides with" the cuter. faces'of the rods Eil', and being provided"` with yfastening means, e. giscrews; which serrure the plate tethercdsi. In order" to clfrai'i'geJtlifef` rods 5d, while theV rounded surfacesy arefeutsidaf L==r and facilitate easy movement of' the tubular.- material. inits spiraldovmwardftravelover the mandieL The. side-of 'themandrel plate". 12 carriesaslig-htly tapered` shoe 58,.. Whichfiss" adapted to enter. andvv spread the'y dewnwardiyv moving tubular material andguideit over the` mandrel section. Y

The fixed mandrelsection. is substantially thev sameQas regards the mandrel proper as thernovable mandrel section, and. comprises the` datr square board or plate 5'9` xed tothe rods 5i by sciews 3d and provided with bali-round. side pieces 5l 'and an upwardly. projecting tapered'r shoe 62. Y l

Thus far the present invention is desciiibedasn consisting' of Va, base', a iixed andra rilevabile. sup- The opposite upandianglerbetween itsuniversal'.. jointsand stillI Y 50.' however, thateinchanging tlief'angle of therfeedr porting standard and ilat mandrel sections exn tensibly carried at the upper ends of tloefstandt ards and adapted to enter' lthe downwardly. movtween tnef mandrelI sections.. i Tlieidisc 66.' andi the-feedroiler' "Mlare'shown" asadijustecr to the?. 'K position: which'.y enablesj the.` materialf. to beV fedi downwardly and spirallyin a .clockwise'directionf l r over'theouterifaeefoftlieizirandrelsections.v l f The^lower endof 'theieedlrollerr andits' shaft? scoeiefssnaft'ia which projeetsfeswnwardly anni.

ang-lent tlieperpendioular and? is connected ati its'iower endo to*y aL second" 'universal' joint'` 1'4" conf nected to the upright endoffthefsiatt- '45. VIi the: anfglefof' the feediroller'tischanged 1t' elcta diferentidegreefofbiasor'to change ironia' clock- Wise feed: uo-af comitewcloekwi'se 'feed ldfret:ti'fni-VA shown in'dotted lines in'Flgu'rd-;thesliaft'13' iscaqjable'ofrad'justing. itself toany'fde'sired length enectivelyfdrive theieedrollere ItisV to' be noted-gf" roller beyondacertain point the mit'er gear "H" andiitsvbzacket- 12 must-be shifted on" the*A disci E5. to. the.v positionshownjin-lv dotted' lines? inf` Y .Y

Flignredl, g H Y The material A traversingthemandifelsectionr 54 is pressed intoJelose contactwith-the surface oi`t`lieieedrollerV Elf-appearing inthe opening',`

similar inle'ngtli'and diameter to f'eediroller. G3i

pressure roller' is supported at'its ends inayeke v isloo's'e'iy di'spos'ed; the' ends thereof projecting" springs 18",' each thereofff' y avingifonejend ofits coilf` nzientof the spinclle'f 'H andtheY other end engaging-ftnfearxnof'the yokelto yieldably 'urge tlielatter and' roller'lf towards1 e 'mi The spindlei llprojects'.' downwardly atv an "the closed sident W ich a,V spindle l1 v` ts consideri' ably beyonditheeyolee l5" 'and' is-fcarrie-d for' bothl` longitudinaland'.A rotary" adjustment. in a'. block* angle and through a boreY 85|Y in the block 19 and is fixed in adjusted position thereinY by means of a set screw 8|. The block .19 is provided with a second bore 82 disposed at right angles to and spaced below the first bore 88 tri-receive therein the lateral arm 83 of a right anglesupporting rod S4.

Y The arm S3 projects outwardlyrfrorn the face of the mandrel section 54 and the block 19 is capable of both longitudinal and rotary adjustment over the arm 83 to which it is rigidly aixed byv meansv of' a set screw 85 after proper adjustment iseffected. The supporting rod S4 telescopes into the upper end of the tubular standard 49, which, as previously explained, is supported upright on the carriage 25. A collar 85 is fixed 'to the rod 84 adjacent'the elbow thereof and rests upon the upper end of the tubular standard tand the standard at this point is provided with a set screw 81 to rigidly ailix the rod 84 in the standardv 9 at any desired elevation.Vv The support for the pressure roller 15 is suiliciently universal toen-v able the latter to be adjusted to the proper height and angle whereby the pressure roller will operate n against and parallelto'the feed roller 6d, I

- marginally disposed about theV outer face ofthe disc 66;.which graduations are adapted toregis` ter with an arrow or pointer 89 on the face of the section 53 at the top of the opening 81. The

disc 66 is fixed in any of its adjusted positionsk by means of a set screw 98 projecting radially of the opening 61 at the top ofthe section 54 and disposed in a threaded bore which opens into the peripheral edge of the disc.; The set screw 95 is simply tightened againstjthe disc 5S to vhold it firmly in the section 54.

Referring nowto the feed vfor the iixed'mandrel section 5|, see Figures l, 3` and 4, it will be seen that there Vare certain parts which are the same as the corresponding elements of the movable mandrel section. For example, the plate 59 is provided with its feed roller 64, disc support 55 having the .slot 68 and depending legs 5|A telescopically supported in the upright tubular standards 38. The miter drive gears 9|, 92 and bracket 931are similar to the corresponding ele-V ments of the movable section and are operated through a universal joint 95,k which is connecte to the upright shaft 49. A f

A pressure roller 91, similar to pressure roller 15, is supported at the outside of plate 59,7between the arms of a, yoke 98, which is loosely carried on a spindle 59 and yieldably pressed to bring the pressure roller against the feed roller by means of springs |99. 'I'he spindle 99, in this arrangement,V projects upwardly at anfangle and its end is' mounted in an opening |91 in a block |92, the spindle being adjustable both rotatably and longitudinally in the opening A set screw |93 in the block |82 engages and fixes the spindle in any of its adjusted positions. rfhe block |02 is provided with a second vbore |84 disposed at right angles to the first yand adapted to receive the lateral arm |85 of an upright supporting rod |55 which is telescopically supported in a tubular ex- Cil CII

of `to receive the section |25.

tension IIlV of an upright supporting 'tubulanY can be fixed in any adjusted position by means of a set screw |89.v Y

The tubular standard |88 projects upwardly to an elevation slightly above that of the standards 36 and 33 and receives a T-shaped fitting I I0, the extension |01 being screwed'into the upper arm -of the fitting, as illustrated in Figure 1. The telescopicv rod |86 projects downwardly into the extension |51, through the fitting l0 and into the standard los. This lconstruction allows Vfor the upright adjustment of the pressure roller 91.

The side or laterally projecting arm of the fitting I |9 carries a shaft II which projects outwardly away from the outer face of the fixed mandrel 59, and which is provided with a longitudinal keyway H 2. The shaft is prevented from turning in the fixture by means of a set screw H3. Supported on the shaft is the cutting mechanism which comprises a plate and bearing H4 embracing the shaft |H and prevented from turning thereon by a key H5 projecting into the keyway H2. The angle of the plate H4 parallels the angular position of the feed and pressure rollers 64 and 91. The plate H4 carries the base of an electric motor H5, the shaft H1 of which has secured thereto a cutting wheel or disc knife H8. The plane of the disc H8 is disposed at right angles to the axis of the pressure roller 9'! and at an elevation just below the latter so as to bring the material being fed by the rollers directly into the knife. The exposed edge of the disc knife! I8 beyond the short sector exposed to the material traversing the mandrel section 59 is shielded by a guard H 9 carried by a support attached to the plate I I4.

Y The details of construction pertaining to the fixed mandrel section 59 and cutting mechanism are illustratively exemplified in Figures l0, llV and l2. The cutting edge of the knife H8 is spaced from the surface of the plate 59 and its disc 66 and operates in an elevator cutting female guide .|2I, which comprises a narrow strip of material having a threaded stud |22 projecting from its back surface andthroug'h a radial slot'l23 in the Y disc 66, to receive a nut |24 adapted to clamp the guide to the disc BS. The strip forming the guide |2| comprises two parts, a dove-tailed section |25 carrying the stud |22 and a semi-round' section |26 having its flat side provided with a dovetailgroove |21 disposed longitudinally there- A The crown of the section |25 is provided with a longitudinal groove |29 in which the cutting edge of the knife disc H8 operates; The opposite ends of the elevator are round and taper off towards the back, as shown in Figure l0. A i

In operation the material traversing the fixed mandrel' is'drawn downwardly in a spiral direction and fed tothe cutting disc I8 over the elevator guide |2|. This construction allows the elevator I 2| to adjust itself to an angular position of the knife disc H8. The elevator I2I is securely locked in position on the disc 55, because the tapered sides of the section |25 co-act with the sides of the glOOVe |21 as the nut |24 is tightened on the stud |22 to clamp the elevator tightly to the surface of the disc 65. It is also to be noted that rotary adjustment of the disc and angular adjustment of the elevator will give an almost complete field of angular adjustment for the elevator with respect to the cutting knife I I8.

The constructiondescribed up to this point includes xedand movable mandrel sections, the

latter of which is adjustable towards and away from the former to accommodate the different esta sizes of `tubular material to be out. t has been found that to make a machine of `this character entirely iiexible as regards the variations'i tube sizes, further means are necessary to compensat for such variations. One form of compensator means used for the purpose is illustrated par# ticularly in Figures 1 to 4, inclusive, and 14 and l5,

and comprises adjustable sets of rollersv carried by the iixed mandrel supports. i

The support for the compensators comprises a tie plate |29 disposed laterally of the machine be? neath the lower side of the xed mandrel plate 5S and is attached by' means of screws orvbolts to the upright tubular standards 38 and |38. On th A inner sides of the standards' as there are liet stripe *I |30 projecting from the top of the standards'A to an elevation substantially midway' of the height thereof.

tween the Strips :es and the' bexI is i endtueuiar spacing sleeves |33. It'will be understood that it is preferable, although vnot absolutely necessary', l i

to maintain the compensators at a plane quidis tant between the two mandrels. Thebox |3 ifi therefore is spaced the necessary distance the xedmandrel plate 59 by the bolts and sleeves which areof theproper length tolproperly posi;

tion the compensators. -If no spacing sleeves are used, the bex islboited directly to ih elstrips as ishown indotted lines in Figure 3and in full lines in Fig'ilre. v Y v., l

The gear and guideV box i3 see Figures l and 2, comprises an elongated hollow structure Vhaving" The strips '3B provide theY supporty ior. a4 gear and guide box f|3| and the means u sedto establish they support .are bolts |32 projecting be-L 4, bring' meepraten-eater reizigers inside die' hineare provided Cured there@ i upright eeeketgitfi Whfehgtiie'iotver-fend ,ef er; upright heft me sexe-1.. g-

ere'seeiiapednsture f eenieder opper enal er the Sheff; et en eleva;

and 55S f upright front and back Walls |734, top and bottoni i-' Y weile Isa-ende be-ttompmte les which iebeiew.

the bottom surfaces of the Walls |34 and is'spaced from the bottom |35 and bridges the gap there between.- The top surface of thetop wall .|1351 lis providedv with spaced guide strips |31 rnnning longitudinally :of the nbox. Operatingl init/hre.

spaces underl and over the top and bottornwalls |35 are toothed racks |33 and |39, rack |38being disposed to mo've'longitudinally of one end of the box |3| while rack |39 operates "longitudinally of the opposite end, the teeth of both racks beingdirectedtward's each other. The racks project befv yon'd the center portion j of the box and-'their yondthe wall on the outside to accommodatela crank used in rotating the gear and simultarie ously projecting or retractingr the racks lfand l, |39. The outer end of rack |38 is flat and carries an upright tiel pin |42 which is attached vat vitsv upper end to a slideplate |43 projecting intqthe space'be'tween the guiderl strips |31 `and atits lower end in a second slide plate Itllfslida'bly mounted-in they space above the plate |36 in the bottom wall |35 of the box.l Movement of the rack |33 in and out of the end of the box produces the same movements in the twoslide plates |43,A

and |44, which as hereinafter described, carry the upper andlower compensator rollers orrorie side offthe machine. v l v -A Y, AThe lower rack |39` is fiat at the outerend pro. jectiiig from the opposite end of the box 73,| andf is provided with an upright tie pinY |45', the lower tions. teeth engage a pinion gear |49.V The gear I''is l supported in bearings in the walls ofthe box and l is providedwith a square shank| 4| extending ,be-T

end thereof b'ein'gattached to the rack |33 riding I n inf the space ebevetheipieteiss, whiie the upper end' is attached to anv upper slide plate |161'V opere ating inthe groove between guide strips |`31 atl thegtop of the box. y .A .A The upper slide plates |53 and |41 when cril` awe jejenethei the space occupied'- Ybythe gearv 't' opposite ends' of *the* 

